http://cgi.ebay.com/ws/eBayISAPI.dll...spagename=WDVW
Same seller has an early CMP Ford up plus a Humber, but I can't say the prices do much for me.
The open cab Dodge has a one piece screen, and the closed cab one has a civilian cab, so I'd expect the seller isn't particularly knowledgeable about these things.
I've seen parabikes go for a couple of hundred pounds, but anyone asking thousands needs a reality check methinks.